Add a switch to redetermine role when ICE restarts.

webrtc/api/peerconnectioninterface.h

Index: webrtc/api/peerconnectioninterface.h
diff --git a/webrtc/api/peerconnectioninterface.h b/webrtc/api/peerconnectioninterface.h
index fdf9cef51ec2a2a8b419227522d085a36b2c4ad2..e42c0e85509b948a835585c763f686883d3d5a06 100644
--- a/webrtc/api/peerconnectioninterface.h
+++ b/webrtc/api/peerconnectioninterface.h
@@ -305,6 +305,8 @@ class PeerConnectionInterface : public rtc::RefCountInterface {
     // If set to true, this means the ICE transport should presume TURN-to-TURN
     // candidate pairs will succeed, even before a binding response is received.
     bool presume_writable_when_fully_relayed = false;
+
+    bool redetermine_role_on_ice_restart = true;

[pthatcher1, 2016/08/29 22:18:07]

Should this have a comment?

[honghaiz3, 2016/08/29 23:16:59]

Done.

   };
 
   struct RTCOfferAnswerOptions {